Improvement in force-pumps



W. N. STARR.

FORCE-PUMP.

N0,188,977, Patented March 27,1877.

INVENTOR @MW M4 ATTORN EY/,

WRTNESSES N.PYERS, PHOT0LITHOGRAPHER. WASHINGTON. D C.

UNITED STATES PATEN WILLIAM N. STARR, OF ASHLAND, OHIO.

IMPROVEMENT IN FORCE-PUMPS.

Speciiicationforming part of Letters Patent No. l88,977, dated March:17, 1877; application tiled February 24, 1877.

To all whom it may concern Be it known that I, WILLIAM N. STARR, ofAshland, in the county of Ashland and State of Ohio, have invented a newand valuable Improvement in Force-Pumps; and I do hereby declare thatthe following is a full, clear, and exact description of theconstruction and operation of the same, reference being had to theannexed drawings, making a part of this specitication, and to theletters and figures of reference marked thereon.

Figure l of the drawings is a representation of a central verticalsection of my force pump; and Fig. 2 is a side elevation of the same.

This invention relates to force-pumps.

The nature of said invention consists in certain improvements in pumps,as will be hereinafter more fully set forth.

In the accompanying drawings, A designates the hollow upper casing orpump-post of a force-pump; andBdesignates an operating-lever orpump-handle, pivoted in a slot, a, at the top of said casing. The innerend of said lever or handle B gives vertical reciprocating motion to apiston-rod, C, within said casing or hollow pump-post A. The lower partof said piston-rod works in a pump-cylinder, consisting of a largerlower cylinder, D, and a smaller upper cylinder, E. The contiguous endsof said parts D and E are provided with annular flanges d and e, betweenwhich sets a packing-ring, F, of leather, rubber, or other suitablematerial.

In the smaller upper cylinder E works a rubber pist-on, G, having theform of an inverted flat-bottomed cup, the bottom thereof being bracedby upper and lower metal strengthening-plates G1 G2. Said piston isheldin place by upper and lower nuts Gr3 G4, which engage withscrew-threads formed on said piston -rod C.

H designates a similar .but larger cup-shaped piston, facing the oneabove described, and provided with a metal stiffenin g base-plate, H1,and with a iiexible valve-disk, H2. Said parts H H1 H2 are heldin placeby nuts H3 H4, which work on screw-threads formed in piston-rod C at ornear its lower end. The bottom of piston H is provided with perforationsh, which are extended through plate H1.

It will be observed that, by the above-described construction, thecupshaped pistons G and H can be adjusted on the pistonrod, so that theymay be made to approach or recede from each other, thereby varying theamount of water raised.

Cylinders D and E are held together by small bolts passing throughflanges d and e. Cylinder D is also provided with a flange, D1, whichsets into grooves or recesses on the inside of casing A, and serves tohold the said parts D and A together. This object is further secured byan outlet-tube, I, which extends from the upper part of the cylinder Doutward through said casing A. Said outlettube leads to a smallreservoir, J, one side of which opens into an air-chamber, K. From thetop of said reservoir J a vertical tube leads to a valve-chamber, L, thetop of which is provided with a raised bent discharge-pipe, M.

In the outer side of cylindrical valve-chamber L is formed aninwardly-extending V- shaped valve-seat, L', inclosing a triangularspace, l. The outer wall of said valve-chamber has a perforation, l1,communicating with space l, and the upper incline of said valveseat L isprovided with a similar perforation, I?, which is adapted to be beclosed by an inclined drip-valve, M. Said valve is pivoted to the upperpart of said V-shaped valve-seat, and provided with a short extension,m, which overhangs the ridge or vertex thereof.

The casing of chamber or reservoir J is provided with side plates orlugs J1 J1, which form, with a bent rod, J2, screw-threaded at each endand suitable nuts, a clip for holding said reservoir and its attachmentsto casing A. Discharge-pipe M is held to said casing, and braced by abent fastening-plate,M2. Additional clips may be used, if desired, tohold the various parts ofthe apparatus together.

The operation of the above-described devices is as follows: When rod Gdescends, water is forced up through piston H (raising valve H2) intothe space between pistons G and H, while at the same time the saidpiston G operates to force water out of said space through tube I. Onraising rod C valve H2 closes and the water in the said space is raisedby piston H and partly forced thereby through said tube I, The pump isthus double-acting.

While the upward flow continues the dripvalve M1 is kept closed by thepressure of the water against the under side of extension m. But whenthe said How ceases the said valve opens, by the pressure ofthedownward-tlowing water on the top ot' said extension and by its ownweight, and it allows the water remaining above it to drip down throughperforations l1 l2, and thus escape from the pump. This prevents allinjury arising from freezing, and especially keeps the discharge-tube ofthe pump unclogged by ice in winter-time.

By constructing my pistons G and H of rubber I insure a [it between themand the cylinders in which they work, irrespective of atmospheriechanges, which so often impair the usefulness of wooden pistons. I may,however, substitute leather or other flexible material for rubber insaid pistons. I may also curve their bottoms instead of making,r themdat, as shown, in which ease the metal stil'eningplates must be curvedalso. Various other changes of form and arrangement may be made Withoutdeparting from the spirit of my invention.

What I claim as new, and desire to obtain by Letters Patent, is

1. The ilexible cup-shaped piston G, provided with metallic plates GIGrZ and nuts Gra G4, in combination with the flexible cup-shaped pistonH, provided with the perforated metal plate H1, valve-disk H2, nuts H3H, and screw-threaded pistonrod C, whereby the pistons can be adjustedon the rod relatively to each other, substantially as described.

2. Drip-valve M1, provided with extension m, in combination withvalve-seat L and valve-chamber L perforated at l1, substantial- Iy asand for the purpose set forth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

WILLIAM N. STARR.

Witnesses WILLIAM OsBoRN, P. S. GRossoU'r.

